package com.example.cainiao.P11;

import java.util.*;

public class Main5 {
    public static void main(String [] args) {
        System.out.println( "集合实例!\n" );
        int size;
        HashSet collection = new HashSet ();
        String str1 = "Yellow", str2 = "White", str3 =
                "Green", str4 = "Blue";
        Iterator iterator;
        collection.add(str1);
        collection.add(str2);
        collection.add(str3);
        collection.add(str4);
        System.out.print("集合数据: ");
        iterator = collection.iterator();
        while (iterator.hasNext()){
            System.out.print(iterator.next() + " ");
        }
        System.out.println();
        collection.remove(str2);
        System.out.println("删除之后 [" + str2 + "]\n");
        System.out.print("现在集合的数据是: ");
        iterator = collection.iterator();
        while (iterator.hasNext()){
            System.out.print(iterator.next() + " ");
        }
        System.out.println();
        size = collection.size();
        System.out.println("集合大小: " + size + "\n");
    }
}